| 广西钦州地区那丽花岗岩LA—ICP—MS锆石U—Pb定年及其地质意义 |
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| 引用本文： | 贾小辉,王晓地,杨文强,牛志军,周岱.广西钦州地区那丽花岗岩LA—ICP—MS锆石U—Pb定年及其地质意义[J].中国区域地质,2012(1):82-89. |
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| 作者姓名： | 贾小辉 王晓地 杨文强 牛志军 周岱 |
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| 作者单位： | 中国地质调查局武汉地质矿产研究所,湖北武汉430223 |
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| 基金项目： | 中国地质调查局基础地质综合研究项目《南岭成矿带基础地质综合研究》（编号：k201024） |
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| 摘 要： | 位于广西南部钦州地区的那丽岩体是华南地区（除海南岛外）报道的、具精确同位素年龄的海西期花岗岩岩体，LA—ICP—MS锆石U—Pb定年结果显示其形成时代为262Ma。二叠纪时期，羌塘一中缅Sibumasu地块与印支地块碰撞拼合，导致华南陆块俯，中于印支陆块之下，那丽花岗岩可能形成于这种俯）中作用的较晚阶段——弧后伸展环境。
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| 关 键 词： | 钦州地区 海西期 那丽花岗岩 弧后伸展环境 |
Jia X H, Wang X D, Yang W Q, Niu Z J, Zhou D. LA-ICP-MS zircon U-Pb age of the Nali granite in Qinzhou area ofsouthern Guangxi and its geological significance. |
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| JIA Xiao-hui,WANG Xiao-di,YANG Wen-qiang,NIU Zhi-jun,ZHOU Dai.Jia X H, Wang X D, Yang W Q, Niu Z J, Zhou D. LA-ICP-MS zircon U-Pb age of the Nali granite in Qinzhou area ofsouthern Guangxi and its geological significance.[J].Regional Geology of China,2012(1):82-89. |
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| Authors: | JIA Xiao-hui WANG Xiao-di YANG Wen-qiang NIU Zhi-jun ZHOU Dai |
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| Institution: | Wuhan Institute of Geology and Mineral Resources, China Geological Survey, Wuhan 430223, Hubei, China |
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| Abstract: | This paper reported the recent discovery of Hercynian granite at Nali of Qinzhou in Guangxi. The Nali granitic body has crystallization ages of 262Ma obtained by LA-ICP-MS zircon U-Pb method. In Permian period, the collision between Qiangtang- Sibumasu block and Indochina block resulted in the thrusting of South China block beneath Indochina block. The Nali granites were generated at the late stage of this subduction, probably in a back-arc extension setting. |
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| Keywords: | Qinzhou area Hercynian Nali granite back-arc extension background |
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